Pathways to increase the dissymmetry in the interaction of chiral light and chiral molecules.
Pathways to increase the dissymmetry in the interaction of chiral light and chiral molecules.
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DOI：
10.1039/d1sc02335g
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发表时间：
2021-07-01
期刊：
影响因子：
8.4
通讯作者：
Fuchter MJ
中科院分区：
文献类型：
--
作者：
Greenfield JL;Wade J;Brandt JR;Shi X;Penfold TJ;Fuchter MJ
圆偏振（CP）光和手性分子之间的不对称相互作用是一系列领域的核心，从光谱学和成像到下一代光子器件。然而，对于许多分子系统，左手CP光与右手CP光的吸收或发射的选择性低。在这个角度来看，我们评估的幅度的各种手性系统，从小分子到大的超分子组装体的手性光学响应，并强调对提高手性活性的挑战。我们解释了低CP不对称性的起源，并展示了最近的例子，其中分子设计，光本身的修改，使更大的响应。我们的讨论涵盖了手性发色团的空间延伸、跃迁偶极矩的操纵、禁戒跃迁的利用和宏观手性结构的创建;所有这些都可以增加不对称性。虽然采取的具体策略，以提高不对称的相互作用将取决于感兴趣的应用，这些方法提供了希望的发展和进步的所有研究领域，涉及手性分子和光的相互作用。这一观点探讨了圆偏振（CP）光和手性分子之间的不对称相互作用。这种相互作用对于从下一代显示器到不对称光化学合成的许多应用是至关重要的。
The dissymmetric interaction between circularly polarised (CP) light and chiral molecules is central to a range of areas, from spectroscopy and imaging to next-generation photonic devices. However, the selectivity in absorption or emission of left-handed versus right-handed CP light is low for many molecular systems. In this perspective, we assess the magnitude of the measured chiroptical response for a variety of chiral systems, ranging from small molecules to large supramolecular assemblies, and highlight the challenges towards enhancing chiroptical activity. We explain the origins of low CP dissymmetry and showcase recent examples in which molecular design, and the modification of light itself, enable larger responses. Our discussion spans spatial extension of the chiral chromophore, manipulation of transition dipole moments, exploitation of forbidden transitions and creation of macroscopic chiral structures; all of which can increase the dissymmetry. Whilst the specific strategy taken to enhance the dissymmetric interaction will depend on the application of interest, these approaches offer hope for the development and advancement of all research fields that involve interactions of chiral molecules and light. This perspective explores the dissymmetric interaction between circularly polarised (CP) light and chiral molecules. Such interactions are central to many applications from next generation displays to asymmetric photochemical synthesis.
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